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Home Heating and Cooling Audit 111 ) Sty' \i> Nils!!,/ \&y \&*/' W \^y \gy Vsty' Ni$y S^y Visy Vs^y Copyright © 1983, Small System Services, Inc. All rights reserved. Reproduction ortranslation ofany part of this work beyond that permitted bySections 107 and 108of the UnitedStates Copyright Act withoutthe permission of the copyright owner is unlawful. "Home Heating andCooling Audit" was originally published inCOMPUTE! Magazine, July V&y 1981, Copyright © 1981, Small System Services, Inc. "Window Heat Loss/Gain" was originally published as"Window Heating Analysis" in COMPUTE! Magazine, December 1981, Copyright © 1981, Small System Services, Inc. "Energy Workbook" was originally published in COMPUTE! Magazine, March 1982, Copyright © 1982, Small System Services, Inc. w Printed in the United States of America by the Walnut Circle Press. w ISBN 0-942386-10-8 Nsfcy 10 987654321 Small System Services, Inc., Post Office Box 5406, Greensboro, NC 27403, (919) 275-9809, isanindependent publisher ofquality consumer products for thepersonal computer industry, and is not associated with any manufacturer of personal computers. VIC-20 is a trademark ofCommodore Electronics Limited. Atariisa trademarkofAtari, Inc.TI-99/4A isa trademark Sumy of Texas Instruments. Commodore 64 and PET are trademarks of Commodore Business Machines. Apple isa trademark ofApple, Inc. Color Computer isa trademark ofRadio Shack. W \%y' Table ofContents Introduction v Energy Data Base 1 Energy Workbook 23 Energy Plot 61 Electric Usage Estimator 91 Home Heating And Cooling Audit 111 Heat Conduction 151 Buying A New Air Conditioner 169 Window Heat Loss/Gain 183 Window Shading Analysis 209 Ceiling Fan Analysis 227 Appendix 241 Q w w V&y w w w Q Vgy^ w o W w w w w w \say w W \^y V«ey ^y w v&y Vgy1 s^gy* w sup1 Introduction Each chapter in this book is designed to explore a significant aspect of home energy consumption. Chapters begin with a discussion of the methods and merits of a particular kind of energy analysis. Following that is a computer program translated into versions for each of these popular home computers: VIC, Atari, Apple, TI-99/4A, Commodore 64, Radio Shack Color Computer, PET/CBM, and OSI. The programs will analyze and report suggested alterations or improvements to windows, insulation, and other areas of your home where a small investment of time or money now may yield a significant future savings in your energy dollars. Once the computer has information on your geographical area, your current expenses, and details about your house itself, it can provide specific, objective projections. Have your heating costs been increasing by 30% or more each year? Are you considering storm windows, a clock thermostat, more insulation, caulking, weather- stripping, or other defensive measures against the upward spiral of utility costs? Since everyone's home is different and there are great variations in climatic conditions in the United States, it is often difficult to determine which of many alternatives is the best way to go about reducing energy consumption. These programs, utilizing the particular characteristics of your house together with the climate in your area, report projected savings for the homeowner. The effects of a great variety of different energy-saving improvements at locations anywhere within the contiguous 48 states are analyzed and forecast in complete, understandable reports. You can use these graphs and reports to look at projected savings, together with costs and the current economic outlook to decide if each approach meets your criteria for a worthwhile investment. Here's a major personal financial problem which can directly benefit from the speed and power of your personal computer. It's one of the fastest ways to make the computer pay for itself. When friends and neighbors find out what you're up to, don't be surprised if they ask you for a home energy analysis too. In most cases, these programs can result in very impressive savings. The Apple and PET/CBM versions are the same as the Commodore 64 versions except in those cases ("Energy Plot" for example) where graphics variations required individualized programs. In some cases ("Home Heating And Cooling" for example), a lengthy series of DATA statements is identical in each computer's version. When this is the case, simply add the separate DATA list to your computer's program. If you are using an 80-column screen such as the CBM 8032, some programs contain information in REM statements to make adjustments for a more pleasing screen format. All programs are clear and well-commented. With the exception of "Energy Plot," the screen formats are essentially interchangeable and do not rely on graphics or computer-specific video techniques. There are notes in each chapter about any special handling required for particular computer models. Before typing in any of the programs in this book, check the Appendix for an explanation of the conventions used in listing special keyboard characters. Q Q Q Q Energy Data Base Note: Thisprogram creates files of energy usage data for future reference and foruse by other programs in this book. The OSI, Atari, Apple, and Color Computer versions store the filesto disk. The VIC, PET/CBM/64, and TIversionscreatedata files on tape. Keeping track of energy use and cost is an integral part of any serious attempt at conserving energy cost. I have been doing this for several years by simply graphing my energy use on a chart, using my electric and natural gas bills. This is quite adequate to determine when I am reducing my energy use. However, unless I also keep track of the cost, I am seeing only part of the picture. If I were to start keeping track of the cost on a chart, there would undoubtedly be other factors (such as cost per unit of energy or energy used per degree day) that I would also want to plot, and if I were not careful, Iwould end up plotting so many different factors that this would become a burden and I would likely forget the whole idea. This data base program allows both energy use and cost to be saved on disk or tape and recalled by other programs, so that I don't have to constantly enter the same data in various programs. The data are saved by month and year, and additional data can be added as the need occurs. The dimensions for the energy (E) and cost (D)are made to be variable so that the program can be run on systems of varying size. The program has provisions to create and edit files called "NATGAS," "ELECT," "COAL," "OIL," and "WOOD." Should you desire to add other utilities, such as water, then simply remove one of the unused utilities from lines 380-420. The program has five commands: L = list data, I = input data, G = get data from disk or tape, S = save data to disk or tape, and E = edit data (includes adding an additional year). Adding Additional Years When you enter "edit", a year of data will be displayed. If you desire to edit a different year, simply answer "N" to the prompt "Is line to be edited shown". Once the year desired is shown, answer with "Y", and the program will prompt you for the month desired. The program requires an exact match with the string for the 1 W month, so be sure to enter the month as abbreviated in the program. w Ifyou want to enter an additional year ofdata, answer "N"to w each existing year as it is displayed. The program will add one to the number of years of data (N) and willgo into input mode when w you answer that you want to add to the numberofyears. If you w plan on adding an additionalyear ofdata to the data base, you must allow for this addition when answering the prompt at the ^ beginning of the program for the number of years. w; Reference: w Retelle, Bob. PEEK (65), vol. 2(October 1981), p. 14 (P.O. Box 347, w Owings Mills, MD 21117). Table. Sample Run — Electric Usage Data. ENERGY DATA BASE w! # YEARS FOR DATA BASE (DEFAULT=5)? 3 ^ (L,I,G,S,E)? I 1) NATURAL GAS 2) ELECTRICITY W 3) COAL w 4) OIL 5)WOOD W CHOOSE ONE ? 2 BEGINNING YEAR 1979 W ENDING YEAR 1981 YEAR ELECT ELECT 1979 USAGE COST JAN 750 30.19 FEB 827 33.16 MAR 718 31.86 Ntty APR 728 31.64 MAY 875 35.95 JUNE 1192 50.92 1 JULY 1768 76.92 AUG 2043 86.1 SEPT 2166 88.1 OCT 664 30.99 NOV 775 33.58 DEC 777 34.39 YEAR ELECT ELECT 1980 USAGE COST JAN 714 37.54 FEB 679 34.02 MAR 673 31.34 APR 716 31.53 MAY 861 40.75 JUNE 1576 81.07 JULY 1980 102.36 AUG 2043 105.62 SEPT 1761 92.2 OCT 1261 67.49 NOV 775 41.48 DEC 955 46.43 YEAR ELECT ELECT 1981 USAGE COST JAN 777 38.26 FEB 846 43.21 MAR 804 45.14 APR 933 52.96 MAY 1098 62.33 JUNE 1570 107.8 JULY 1980 141.03 AUG 2046 137.08 SEPT 1638 109.91 OCT 1370 91.47 NOV 605 37.84 DEC ' 833 53.83 <y> Program 1. OSI Version. 10 REM ENERGY DATABASE 25 R*»CHR*<13> 30 GOSUB530:PRINTTAB(25>*"ENERGY DATA BASE":PRINTXPRINT:PRINT 35 REMPOKE2888»0:POKE8722,0:REM ACCEPT NULL INPUT 40 INPUT"* YRS FOR DATA BASE":n:IFN«0THENN=5 50 dimm«<12>,e<n,12>,d<n,12> 60 fori«itoi2:readm*<i>:next:print 70 datajan,feb,mar,apr,may,june,july,aug,sept,oct,nov,dec 80 print"<l,i,g,s,e)" 90 GOSUB540 100 Y«<C>68)+<C>70>+<C>72>+<C>75)+<C>82> 110 ONABS<Y>GOSUB130,320,350,270,510:GOTO80 115 END 120 REM EDIT 130 printtab(io>:"edit":fori=iton:gosub48o:form'=itoi2:printm*(m>:tab<i5)| 140 printe(i,m)jtab<29> jd<i,m>:next 150 print:print"is line to be edited shown?":print"<y> or <n>" 160 gosub540:ifc=78thennext:goto220 170 ifco89then160 180 input"month to edit"*a*:f0rj=lt012:ifm*<j)oa*thennext 190 PRINT"EDIT MONTH 0F":M»<J)}E<I,J)JD<I,J>:iNPUT"ENERGY USAGE"*E<I,J) 200 INPUT"ENERGY COST"JD(I,J> 210 RETURN 220 PRINT"ADD 1 YEAR TO DATA BASE, <Y> OR <N>" 230 GOSUB540:iFC=78THENRETURN
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